make app configurable via CLI and ENV parameters

.dev.env

@@ -0,0 +1,4 @@
+DOORIS_OPENID_ISSUER=https://id.hamburg.ccc.de/realms/test/
+DOORIS_OPENID_CLIENT_ID=dooris
+DOORIS_OPENID_CLIENT_SECRET=dp9HhnvUhAtKm3pRnxfGA7q8Nwrd1td8
+DOORIS_BASE_URL=http://localhost:8000

api/src/dooris_api/__init__.py

@@ -1,8 +1,51 @@
-from dooris_api.app import app
+import os
+from contextvars import ContextVar
+from argparse import ArgumentParser, Namespace
+
+
+app_config: ContextVar[Namespace] = ContextVar("app_config")
 
 
 def main():
+    argp = ArgumentParser(
+        "dooris-api",
+        description="Server to interact with CCCHH doors via locks over CCUJACK over HomeMatic over WiFi",
+    )
+    argp.add_argument(
+        "--openid-issuer",
+        required="DOORIS_OPENID_ISSUER" not in os.environ,
+        default=os.environ.get("DOORIS_OPENID_ISSUER", None),
+        help="The Keycloak OpenID isser to use for authentication",
+    )
+    argp.add_argument(
+        "--openid-scope",
+        default=os.environ.get("DOORIS_OPENID_SCOPE", "openid profile"),
+        help="The Keycloak OpenID isser to use for authentication",
+    )
+    argp.add_argument(
+        "--openid-client-id",
+        required="DOORIS_OPENID_CLIENT_ID" not in os.environ,
+        default=os.environ.get("DOORIS_OPENID_CLIENT_ID", None),
+        help="The Keycloak OpenID client-id to use for authentication",
+    )
+    argp.add_argument(
+        "--openid-client-secret",
+        required="DOORIS_OPENID_CLIENT_SECRET" not in os.environ,
+        default=os.environ.get("DOORIS_OPENID_CLIENT_SECRET", None),
+        help="The Keycloak OpenID client secret to use for authentication",
+    )
+    argp.add_argument(
+        "--base-url",
+        required="DOORIS_BASE_URL" not in os.environ,
+        default=os.environ.get("DOORIS_BASE_URL", None),
+        help="The Base-URL that this application is reachable under",
+    )
+    args = argp.parse_args()
+
+    app_config.set(args)
     import uvicorn
+    from dooris_api.app import app
+
     config = uvicorn.Config(app, port=8000, log_level="debug")
     server = uvicorn.Server(config)
     server.run()

api/src/dooris_api/app.py

@@ -11,7 +11,6 @@ from simple_openid_connect.client import OpenidClient
 from simple_openid_connect.data import TokenSuccessResponse
 from cachetools import TTLCache
 from aiohttp import BasicAuth
-import asyncio
 
 from dooris_api import deps, models, exceptions
 from dooris_api.ccujack import CCUJackClient
@@ -22,6 +21,9 @@ logger = logging.getLogger(__name__)
 
 @asynccontextmanager
 async def lifespan(app: FastAPI):
+    from dooris_api import app_config
+    app_config = app_config.get()
+    
     root_logger = logging.getLogger("")
     root_logger.setLevel(logging.INFO)
     root_logger.addHandler(logging.StreamHandler(sys.stderr))
@@ -29,10 +31,11 @@ async def lifespan(app: FastAPI):
     app_logger.setLevel(logging.DEBUG)
     
     app.extra["oidc_client"] = OpenidClient.from_issuer_url(
-        url="https://id.hamburg.ccc.de/realms/test/",
-        authentication_redirect_uri="http://localhost:8000/auth/login-callback",
-        client_id="dooris",
-        client_secret="dp9HhnvUhAtKm3pRnxfGA7q8Nwrd1td8",
+        url=app_config.openid_issuer,
+        authentication_redirect_uri=f"{app_config.base_url}/auth/login-callback",
+        client_id=app_config.openid_client_id,
+        client_secret=app_config.openid_client_secret,
+        scope=app_config.openid_scope,
     )
 
     app.extra["cache"] = TTLCache(maxsize=64, ttl=30 * 60)
@@ -43,7 +46,7 @@ async def lifespan(app: FastAPI):
 
 
 app = FastAPI(
-    title="Dooris", summary="API for interacting with HomeMatic door locks in CCCHH", docs_url="/api/docs",
+    title="Dooris", summary="Server to interact with CCCHH doors via locks over CCUJACK over HomeMatic over WiFi", docs_url="/api/docs",
     lifespan=lifespan,
 )
 app.add_exception_handler(exceptions.HttpProblemException, exceptions.problem_exception_handler)